CameraService: Add more systracing, fix module init order

Improve debugging of performance of concurrent calls to the service.

- Add ATRACE calls to camera service entry points
- Add ATRACE calls for camera HAL module calls
- Ensure that camera module init method is called before all others

Bug: 23718257
Bug: 23933447
Change-Id: I2a025866ab39eda3962877120cab13a063c7727e